My stereo started cutting out with the engine off last year. I tightened up the terminals and it stopped. It has restarted this year and i cannot get it to stop. It seems to happen faster using the ipod. Once it starts, it continues to happen every couple of minutes, until i just shut it off.

I have a 2 battery set-up. I think it might be something with the non-cranking battery. Or worse a exposed cable somewhere.